| Abstract 摘要 | String theory and cosmology are made for each other. Fundamental questions about our universe call for an understanding of quantum gravity. On the other hand, observational cosmology provides a promising window to probe high energy physics. In this talk, I will discuss how quantum gravity can impose fundamental constraints on inflationary cosmology and the physics of dark matter and dark energy. I will argue why an inflationary universe -- our current theoretical paradigm of the macroscopic world -- is incomplete on its own and requires a microscopic, high energy completion. I will describe some recent developments in constructing inflationary models from string theory, the observational signatures of these models, and how one may use data to uncover the underlying microphysics. |
